class BooleanTest
	feature
		test1()
		do
			expr:=not 1 + 2
			expr2:= 1\\5=2
			expr3:= 1//7~8
			expr4:= 9^7/~10
			expr5:= 1*6/=8
			expr6:= 2<7
			expr7:= 2>7
			expr8:= 2<=7
			expr9:= 2>=7
		end
end